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Cassiopeia

Product

Cassiopeia takes product requirements and returns engineering-ready specs — component behavior, interaction states, spacing, and copy — ready to implement without another meeting.


$299 /month

3-day free trial · No credit card required

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Cassiopeia runs in GCP Cloud Run and handles the gap between product requirements and implementation. It takes a brief, reviews your existing design context, and returns a complete spec covering component structure, interaction states, spacing, copy, and edge cases — in a format engineers can act on immediately.

  1. 01

    Component spec from ticket

    Assign a feature ticket to Cassiopeia. It returns a spec with all interaction states, edge cases, spacing, and copy — no design review round-trips.

  2. 02

    Form flow spec

    Describe a multi-step form. Cassiopeia returns the full interaction spec: validation states, error messages, empty states, and loading patterns.

  3. 03

    Design system alignment

    Cassiopeia checks new components against your existing patterns and flags inconsistencies before engineering implements them.


  • Produces engineering-ready specs from product requirements
  • Covers interaction states, spacing, copy, and edge cases
  • Checks new designs against existing system patterns
  • Returns structured output engineers can implement without clarification
  • Works from task context in Momental
  • 3-day free trial

Product teams without dedicated design resourcesFounders who need design specs for engineersDesign leads who want specs generated from requirements automatically

  • Interaction and component specs from requirements
  • Edge case and state coverage
  • Design system consistency checks
  • Engineering-ready output format
  • 3-day free trial

Setup
< 5 min
Response
Async (spec ready in minutes)
Integrations
Momental Knowledge Graph
Trial
3 days